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[GNUnet-SVN] [gnunet] branch master updated: high-level new ATS service
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From: |
gnunet |
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Subject: |
[GNUnet-SVN] [gnunet] branch master updated: high-level new ATS service implementation |
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Date: |
Thu, 06 Dec 2018 17:03:37 +0100 |
This is an automated email from the git hooks/post-receive script.
grothoff pushed a commit to branch master
in repository gnunet.
The following commit(s) were added to refs/heads/master by this push:
new e298fa7e3 high-level new ATS service implementation
e298fa7e3 is described below
commit e298fa7e3eeafea48a8abf6c5b8bf449b279e7a7
Author: Christian Grothoff <address@hidden>
AuthorDate: Thu Dec 6 17:03:35 2018 +0100
high-level new ATS service implementation
---
src/ats/Makefile.am | 11 +-
src/ats/ats2.h | 7 +-
src/ats/gnunet-service-ats-new.c | 653 +++++++++++++++++++++++++++++
src/include/gnunet_ats_plugin_new.h | 169 ++++++++
src/include/gnunet_ats_transport_service.h | 2 +-
src/include/gnunet_container_lib.h | 10 +-
6 files changed, 842 insertions(+), 10 deletions(-)
diff --git a/src/ats/Makefile.am b/src/ats/Makefile.am
index 648849b1a..52a1e7d11 100644
--- a/src/ats/Makefile.am
+++ b/src/ats/Makefile.am
@@ -99,7 +99,8 @@ libgnunet_plugin_ats_ril_la_LDFLAGS = \
$(GN_PLUGIN_LDFLAGS)
libexec_PROGRAMS = \
- gnunet-service-ats
+ gnunet-service-ats \
+ gnunet-service-ats-new
gnunet_service_ats_SOURCES = \
gnunet-service-ats.c gnunet-service-ats.h \
@@ -118,6 +119,14 @@ gnunet_service_ats_LDADD = \
libgnunetats.la \
$(GN_LIBINTL)
+gnunet_service_ats_new_SOURCES = \
+ gnunet-service-ats-new.c
+gnunet_service_ats_new_LDADD = \
+ $(top_builddir)/src/statistics/libgnunetstatistics.la \
+ $(top_builddir)/src/util/libgnunetutil.la \
+ $(GN_LIBINTL)
+
+
if HAVE_TESTING
TESTING_TESTS = \
test_ats_api_proportional \
diff --git a/src/ats/ats2.h b/src/ats/ats2.h
index 883ac7c38..0882c5f20 100644
--- a/src/ats/ats2.h
+++ b/src/ats/ats2.h
@@ -16,13 +16,13 @@
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
- * @file ats/ats.h
+ * @file ats/ats2.h
* @brief automatic transport selection messages
* @author Christian Grothoff
* @author Matthias Wachs
*/
-#ifndef ATS_H
-#define ATS_H
+#ifndef ATS2_H
+#define ATS2_H
#include "gnunet_util_lib.h"
#include "gnunet_ats_transport_service.h"
@@ -118,6 +118,7 @@ struct ExpressPreferenceMessage
/**
* What type of performance preference does the client have?
+ * A `enum GNUNET_MQ_PreferenceKind` in NBO.
*/
uint32_t pk GNUNET_PACKED;
diff --git a/src/ats/gnunet-service-ats-new.c b/src/ats/gnunet-service-ats-new.c
new file mode 100644
index 000000000..57398e641
--- /dev/null
+++ b/src/ats/gnunet-service-ats-new.c
@@ -0,0 +1,653 @@
+/*
+ This file is part of GNUnet.
+ Copyright (C) 2011, 2018 GNUnet e.V.
+
+ GNUnet is free software: you can redistribute it and/or modify it
+ under the terms of the GNU Affero General Public License as published
+ by the Free Software Foundation, either version 3 of the License,
+ or (at your option) any later version.
+
+ GNUnet is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+/**
+ * @file ats/gnunet-service-ats-new.c
+ * @brief ats service
+ * @author Matthias Wachs
+ * @author Christian Grothoff
+ *
+ * TODO:
+ * - implement messages ATS -> transport
+ * - implement loading / unloading of ATS plugins
+ * - expose plugin the API to send messages ATS -> transport
+ */
+#include "platform.h"
+#include "gnunet_util_lib.h"
+#include "gnunet_statistics_service.h"
+#include "gnunet_ats_plugin_new.h"
+#include "ats2.h"
+
+
+/**
+ * What type of client is this client?
+ */
+enum ClientType {
+ /**
+ * We don't know yet.
+ */
+ CT_NONE = 0,
+
+ /**
+ * Transport service.
+ */
+ CT_TRANSPORT,
+
+ /**
+ * Application.
+ */
+ CT_APPLICATION
+};
+
+
+/**
+ * Information we track per client.
+ */
+struct Client;
+
+/**
+ * Preferences expressed by a client are kept in a DLL per client.
+ */
+struct ClientPreference
+{
+ /**
+ * DLL pointer.
+ */
+ struct ClientPreference *next;
+
+ /**
+ * DLL pointer.
+ */
+ struct ClientPreference *prev;
+
+ /**
+ * Which client expressed the preference?
+ */
+ struct Client *client;
+
+ /**
+ * Plugin's representation of the preference.
+ */
+ struct GNUNET_ATS_PreferenceHandle *ph;
+
+ /**
+ * Details about the preference.
+ */
+ struct GNUNET_ATS_Preference pref;
+};
+
+
+/**
+ * Information about ongoing sessions of the transport client.
+ */
+struct GNUNET_ATS_Session
+{
+
+ /**
+ * Session data exposed to the plugin.
+ */
+ struct GNUNET_ATS_SessionData data;
+
+ /**
+ * The transport client that provided the session.
+ */
+ struct Client *client;
+
+ /**
+ * Session state in the plugin.
+ */
+ struct GNUNET_ATS_SessionHandle *sh;
+
+ /**
+ * Unique ID for the session when talking with the client.
+ */
+ uint32_t session_id;
+
+};
+
+
+/**
+ * Information we track per client.
+ */
+struct Client
+{
+ /**
+ * Type of the client, initially #CT_NONE.
+ */
+ enum ClientType type;
+
+ /**
+ * Service handle of the client.
+ */
+ struct GNUNET_SERVICE_Client *client;
+
+ /**
+ * Message queue to talk to the client.
+ */
+ struct GNUNET_MQ_Handle *mq;
+
+ /**
+ * Details depending on @e type.
+ */
+ union {
+
+ struct {
+
+ /**
+ * Head of DLL of preferences expressed by this client.
+ */
+ struct ClientPreference *cp_head;
+
+ /**
+ * Tail of DLL of preferences expressed by this client.
+ */
+ struct ClientPreference *cp_tail;
+
+ } application;
+
+ struct {
+
+ /**
+ * Map from session IDs to `struct GNUNET_ATS_Session` objects.
+ */
+ struct GNUNET_CONTAINER_MultiHashMap32 *sessions;
+
+ } transport;
+
+ } details;
+
+};
+
+
+/**
+ * Handle for statistics.
+ */
+static struct GNUNET_STATISTICS_Handle *GSA_stats;
+
+/**
+ * Our solver.
+ */
+static struct GNUNET_ATS_SolverFunctions *plugin;
+
+/**
+ * The transport client (there can only be one at a time).
+ */
+static struct Client *transport_client;
+
+
+/**
+ * Convert @a properties to @a prop
+ *
+ * @param properties in NBO
+ * @param prop[out] in HBO
+ */
+static void
+prop_ntoh (const struct PropertiesNBO *properties,
+ struct GNUNET_ATS_Properties *prop)
+{
+ prop->delay = GNUNET_TIME_relative_ntoh (properties->delay);
+ prop->goodput_out = ntohl (properties->goodput_out);
+ prop->goodput_in = ntohl (properties->goodput_in);
+ prop->utilization_out = ntohl (properties->utilization_out);
+ prop->utilization_in = ntohl (properties->utilization_in);
+ prop->distance = ntohl (properties->distance);
+ prop->mtu = ntohl (properties->mtu);
+ prop->nt = (enum GNUNET_NetworkType) ntohl (properties->nt);
+ prop->cc = (enum GNUNET_TRANSPORT_CommunicatorCharacteristics) ntohl
(properties->cc);
+}
+
+
+/**
+ * We have received a `struct ExpressPreferenceMessage` from an application
client.
+ *
+ * @param cls handle to the client
+ * @param msg the start message
+ */
+static void
+handle_suggest (void *cls,
+ const struct ExpressPreferenceMessage *msg)
+{
+ struct Client *c = cls;
+ struct ClientPreference *cp;
+
+ if (CT_NONE == c->type)
+ c->type = CT_APPLICATION;
+ if (CT_APPLICATION != c->type)
+ {
+ GNUNET_break (0);
+ GNUNET_SERVICE_client_drop (c->client);
+ return;
+ }
+ cp = GNUNET_new (struct ClientPreference);
+ cp->client = c;
+ cp->pref.peer = msg->peer;
+ cp->pref.bw = msg->bw;
+ cp->pref.pk = (enum GNUNET_MQ_PreferenceKind) ntohl (msg->pk);
+ cp->ph = plugin->preference_add (plugin->cls,
+ &cp->pref);
+ GNUNET_CONTAINER_DLL_insert (c->details.application.cp_head,
+ c->details.application.cp_tail,
+ cp);
+ GNUNET_SERVICE_client_continue (c->client);
+}
+
+
+/**
+ * We have received a `struct ExpressPreferenceMessage` from an application
client.
+ *
+ * @param cls handle to the client
+ * @param msg the start message
+ */
+static void
+handle_suggest_cancel (void *cls,
+ const struct ExpressPreferenceMessage *msg)
+{
+ struct Client *c = cls;
+ struct ClientPreference *cp;
+
+ if (CT_NONE == c->type)
+ c->type = CT_APPLICATION;
+ if (CT_APPLICATION != c->type)
+ {
+ GNUNET_break (0);
+ GNUNET_SERVICE_client_drop (c->client);
+ return;
+ }
+ for (cp = c->details.application.cp_head;
+ NULL != cp;
+ cp = cp->next)
+ if ( (cp->pref.pk == (enum GNUNET_MQ_PreferenceKind) ntohl (msg->pk)) &&
+ (cp->pref.bw.value__ == msg->bw.value__) &&
+ (0 == memcmp (&cp->pref.peer,
+ &msg->peer,
+ sizeof (struct GNUNET_PeerIdentity))) )
+ break;
+ if (NULL == cp)
+ {
+ GNUNET_break (0);
+ GNUNET_SERVICE_client_drop (c->client);
+ return;
+ }
+ plugin->preference_del (plugin->cls,
+ cp->ph,
+ &cp->pref);
+ GNUNET_CONTAINER_DLL_remove (c->details.application.cp_head,
+ c->details.application.cp_tail,
+ cp);
+ GNUNET_free (cp);
+ GNUNET_SERVICE_client_continue (c->client);
+}
+
+
+/**
+ * Handle 'start' messages from transport clients.
+ *
+ * @param cls client that sent the request
+ * @param message the request message
+ */
+static void
+handle_start (void *cls,
+ const struct GNUNET_MessageHeader *hdr)
+{
+ struct Client *c = cls;
+
+ if (CT_NONE != c->type)
+ {
+ GNUNET_break (0);
+ GNUNET_SERVICE_client_drop (c->client);
+ return;
+ }
+ c->type = CT_TRANSPORT;
+ c->details.transport.sessions
+ = GNUNET_CONTAINER_multihashmap32_create (128);
+ if (NULL != transport_client)
+ {
+ GNUNET_SERVICE_client_drop (transport_client->client);
+ transport_client = NULL;
+ }
+ transport_client = c;
+ GNUNET_SERVICE_client_continue (c->client);
+}
+
+
+/**
+ * Check 'session_add' message is well-formed and comes from a
+ * transport client.
+ *
+ * @param cls client that sent the request
+ * @param message the request message
+ * @return #GNUNET_OK if @a message is well-formed
+ */
+static int
+check_session_add (void *cls,
+ const struct SessionAddMessage *message)
+{
+ struct Client *c = cls;
+
+ GNUNET_MQ_check_zero_termination (message);
+ if (CT_TRANSPORT != c->type)
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ return GNUNET_OK;
+}
+
+
+/**
+ * Handle 'session add' messages from transport clients.
+ *
+ * @param cls client that sent the request
+ * @param message the request message
+ */
+static void
+handle_session_add (void *cls,
+ const struct SessionAddMessage *message)
+{
+ struct Client *c = cls;
+ struct GNUNET_ATS_Session *session;
+ int inbound_only = (GNUNET_MESSAGE_TYPE_ATS_SESSION_ADD_INBOUND_ONLY ==
+ ntohs (message->header.type));
+
+ session = GNUNET_CONTAINER_multihashmap32_get (c->details.transport.sessions,
+ message->session_id);
+ if (NULL != session)
+ {
+ GNUNET_break (0);
+ GNUNET_SERVICE_client_drop (c->client);
+ return;
+ }
+ session = GNUNET_new (struct GNUNET_ATS_Session);
+ session->data.session = session;
+ session->client = c;
+ session->session_id = message->session_id;
+ session->data.peer = message->peer;
+ prop_ntoh (&message->properties,
+ &session->data.prop);
+ session->data.inbound_only = inbound_only;
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap32_put
(c->details.transport.sessions,
+ message->session_id,
+ session,
+
GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
+ session->sh = plugin->session_add (plugin->cls,
+ &session->data);
+ GNUNET_SERVICE_client_continue (c->client);
+}
+
+
+
+/**
+ * Handle 'session update' messages from transport clients.
+ *
+ * @param cls client that sent the request
+ * @param msg the request message
+ */
+static void
+handle_session_update (void *cls,
+ const struct SessionUpdateMessage *msg)
+{
+ struct Client *c = cls;
+ struct GNUNET_ATS_Session *session;
+
+ if (CT_TRANSPORT != c->type)
+ {
+ GNUNET_break (0);
+ GNUNET_SERVICE_client_drop (c->client);
+ return;
+ }
+ session = GNUNET_CONTAINER_multihashmap32_get (c->details.transport.sessions,
+ msg->session_id);
+ if (NULL == session)
+ {
+ GNUNET_break (0);
+ GNUNET_SERVICE_client_drop (c->client);
+ return;
+ }
+ prop_ntoh (&msg->properties,
+ &session->data.prop);
+ plugin->session_update (plugin->cls,
+ session->sh,
+ &session->data);
+ GNUNET_SERVICE_client_continue (c->client);
+}
+
+
+/**
+ * Handle 'session delete' messages from transport clients.
+ *
+ * @param cls client that sent the request
+ * @param message the request message
+ */
+static void
+handle_session_del (void *cls,
+ const struct SessionDelMessage *message)
+{
+ struct Client *c = cls;
+ struct GNUNET_ATS_Session *session;
+
+ if (CT_TRANSPORT != c->type)
+ {
+ GNUNET_break (0);
+ GNUNET_SERVICE_client_drop (c->client);
+ return;
+ }
+ session = GNUNET_CONTAINER_multihashmap32_get (c->details.transport.sessions,
+ message->session_id);
+ if (NULL == session)
+ {
+ GNUNET_break (0);
+ GNUNET_SERVICE_client_drop (c->client);
+ return;
+ }
+ plugin->session_del (plugin->cls,
+ session->sh,
+ &session->data);
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap32_remove
(c->details.transport.sessions,
+ session->session_id,
+ session));
+ GNUNET_free (session);
+ GNUNET_SERVICE_client_continue (c->client);
+}
+
+
+/**
+ * A client connected to us. Setup the local client
+ * record.
+ *
+ * @param cls unused
+ * @param client handle of the client
+ * @param mq message queue to talk to @a client
+ * @return @a client
+ */
+static void *
+client_connect_cb (void *cls,
+ struct GNUNET_SERVICE_Client *client,
+ struct GNUNET_MQ_Handle *mq)
+{
+ struct Client *c = GNUNET_new (struct Client);
+
+ c->client = client;
+ c->mq = mq;
+ return c;
+}
+
+
+/**
+ * Function called on each session to release associated state
+ * on transport disconnect.
+ *
+ * @param cls the `struct Client`
+ * @param key unused (session_id)
+ * @param value a `struct GNUNET_ATS_Session`
+ */
+static int
+free_session (void *cls,
+ uint32_t key,
+ void *value)
+{
+ struct Client *c = cls;
+ struct GNUNET_ATS_Session *session = value;
+
+ (void) key;
+ GNUNET_assert (c == session->client);
+ plugin->session_del (plugin->cls,
+ session->sh,
+ &session->data);
+ GNUNET_free (session);
+ return GNUNET_OK;
+}
+
+
+/**
+ * A client disconnected from us. Tear down the local client
+ * record.
+ *
+ * @param cls unused
+ * @param client handle of the client
+ * @param app_ctx our `struct Client`
+ */
+static void
+client_disconnect_cb (void *cls,
+ struct GNUNET_SERVICE_Client *client,
+ void *app_ctx)
+{
+ struct Client *c = app_ctx;
+
+ (void) cls;
+ GNUNET_assert (c->client == client);
+ switch (c->type)
+ {
+ case CT_NONE:
+ break;
+ case CT_APPLICATION:
+ for (struct ClientPreference *cp = c->details.application.cp_head;
+ NULL != cp;
+ cp = c->details.application.cp_head)
+ {
+ plugin->preference_del (plugin->cls,
+ cp->ph,
+ &cp->pref);
+ GNUNET_CONTAINER_DLL_remove (c->details.application.cp_head,
+ c->details.application.cp_tail,
+ cp);
+ GNUNET_free (cp);
+ }
+ break;
+ case CT_TRANSPORT:
+ if (transport_client == c)
+ transport_client = NULL;
+ GNUNET_CONTAINER_multihashmap32_iterate (c->details.transport.sessions,
+ &free_session,
+ c);
+ GNUNET_CONTAINER_multihashmap32_destroy (c->details.transport.sessions);
+ break;
+ }
+ GNUNET_free (c);
+}
+
+
+/**
+ * Task run during shutdown.
+ *
+ * @param cls unused
+ */
+static void
+cleanup_task (void *cls)
+{
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "ATS shutdown initiated\n");
+ if (NULL != GSA_stats)
+ {
+ GNUNET_STATISTICS_destroy (GSA_stats,
+ GNUNET_NO);
+ GSA_stats = NULL;
+ }
+}
+
+
+/**
+ * Process template requests.
+ *
+ * @param cls closure
+ * @param cfg configuration to use
+ * @param service the initialized service
+ */
+static void
+run (void *cls,
+ const struct GNUNET_CONFIGURATION_Handle *cfg,
+ struct GNUNET_SERVICE_Handle *service)
+{
+ GSA_stats = GNUNET_STATISTICS_create ("ats",
+ cfg);
+ GNUNET_SCHEDULER_add_shutdown (&cleanup_task,
+ NULL);
+#if 0
+ if (GNUNET_OK !=
+ GAS_plugin_init (cfg))
+ {
+ GNUNET_break (0);
+ GNUNET_SCHEDULER_shutdown ();
+ return;
+ }
+#endif
+}
+
+
+/**
+ * Define "main" method using service macro.
+ */
+GNUNET_SERVICE_MAIN
+("ats",
+ GNUNET_SERVICE_OPTION_NONE,
+ &run,
+ &client_connect_cb,
+ &client_disconnect_cb,
+ NULL,
+ GNUNET_MQ_hd_fixed_size (suggest,
+ GNUNET_MESSAGE_TYPE_ATS_SUGGEST,
+ struct ExpressPreferenceMessage,
+ NULL),
+ GNUNET_MQ_hd_fixed_size (suggest_cancel,
+ GNUNET_MESSAGE_TYPE_ATS_SUGGEST_CANCEL,
+ struct ExpressPreferenceMessage,
+ NULL),
+ GNUNET_MQ_hd_fixed_size (start,
+ GNUNET_MESSAGE_TYPE_ATS_START,
+ struct GNUNET_MessageHeader,
+ NULL),
+ GNUNET_MQ_hd_var_size (session_add,
+ GNUNET_MESSAGE_TYPE_ATS_SESSION_ADD,
+ struct SessionAddMessage,
+ NULL),
+ GNUNET_MQ_hd_var_size (session_add,
+ GNUNET_MESSAGE_TYPE_ATS_SESSION_ADD_INBOUND_ONLY,
+ struct SessionAddMessage,
+ NULL),
+ GNUNET_MQ_hd_fixed_size (session_update,
+ GNUNET_MESSAGE_TYPE_ATS_SESSION_UPDATE,
+ struct SessionUpdateMessage,
+ NULL),
+ GNUNET_MQ_hd_fixed_size (session_del,
+ GNUNET_MESSAGE_TYPE_ATS_SESSION_DEL,
+ struct SessionDelMessage,
+ NULL),
+ GNUNET_MQ_handler_end ());
+
+
+/* end of gnunet-service-ats.c */
diff --git a/src/include/gnunet_ats_plugin_new.h
b/src/include/gnunet_ats_plugin_new.h
new file mode 100644
index 000000000..267477871
--- /dev/null
+++ b/src/include/gnunet_ats_plugin_new.h
@@ -0,0 +1,169 @@
+/*
+ This file is part of GNUnet
+ Copyright (C) 2009-2015, 2018 GNUnet e.V.
+
+ GNUnet is free software: you can redistribute it and/or modify it
+ under the terms of the GNU Affero General Public License as published
+ by the Free Software Foundation, either version 3 of the License,
+ or (at your option) any later version.
+
+ GNUnet is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @author Christian Grothoff
+ *
+ * @file
+ * API for the ATS solvers.
+ *
+ * @defgroup ats-plugin ATS service plugin API
+ * Plugin API for the ATS service.
+ *
+ * Specifies the struct that is given to the plugin's entry method and the
other
+ * struct that must be returned. Note that the destructors of ATS plugins will
+ * be given the value returned by the constructor and is expected to return a
+ * NULL pointer.
+ *
+ * @{
+ */
+#ifndef PLUGIN_ATS_H
+#define PLUGIN_ATS_H
+
+#include "gnunet_mq_lib.h"
+#include "gnunet_bandwidth_lib.h"
+#include "gnunet_ats_application_service.h"
+#include "gnunet_ats_transport_service.h"
+#include "gnunet_statistics_service.h"
+
+
+/**
+ * Preference being expressed by an application client.
+ */
+struct GNUNET_ATS_Preference {
+
+ /**
+ * Peer to get address suggestions for.
+ */
+ struct GNUNET_PeerIdentity peer;
+
+ /**
+ * How much bandwidth in bytes/second does the application expect?
+ */
+ struct GNUNET_BANDWIDTH_Value32NBO bw;
+
+ /**
+ * What type of performance preference does the client have?
+ */
+ enum GNUNET_MQ_PreferenceKind pk;
+};
+
+
+/**
+ * Opaque representation of a session the plugin can allocate bandwidth for.
+ */
+struct GNUNET_ATS_Session;
+
+/**
+ * Plugin-relevant information about a session.
+ */
+struct GNUNET_ATS_SessionData {
+
+ /**
+ * Peer the session is with.
+ */
+ struct GNUNET_PeerIdentity peer;
+
+ /**
+ * ATS performance characteristics for a session.
+ */
+ struct GNUNET_ATS_Properties prop;
+
+ /**
+ * Handle to the session that has the given properties.
+ */
+ struct GNUNET_ATS_Session *session;
+
+ /**
+ * Is the session inbound only?
+ */
+ int inbound_only;
+
+};
+
+/**
+ * Internal representation of a preference by the plugin.
+ * (If desired, plugin may just use NULL.)
+ */
+struct GNUNET_ATS_PreferenceHandle;
+
+/**
+ * Internal representation of a session by the plugin.
+ * (If desired, plugin may just use NULL.)
+ */
+struct GNUNET_ATS_SessionHandle;
+
+
+/**
+ * Solver functions.
+ *
+ * Each solver is required to set up and return an instance
+ * of this struct during initialization.
+ */
+struct GNUNET_ATS_SolverFunctions
+{
+
+ /**
+ * Closure to pass to all solver functions in this struct.
+ */
+ void *cls;
+
+ /**
+ * The plugin should begin to respect a new preference.
+ *
+ * @param cls the closure
+ * @param pref the preference to add
+ * @return plugin's internal representation, or NULL
+ */
+ struct GNUNET_ATS_PreferenceHandle *
+ (*preference_add)(void *cls,
+ const struct GNUNET_ATS_Preference *pref);
+
+ /**
+ * The plugin should end respecting a preference.
+ *
+ * @param cls the closure
+ * @param ph whatever @e preference_add returned
+ * @param pref the preference to delete
+ * @return plugin's internal representation, or NULL
+ */
+ void
+ (*preference_del)(void *cls,
+ struct GNUNET_ATS_PreferenceHandle *ph,
+ const struct GNUNET_ATS_Preference *pref);
+
+
+ struct GNUNET_ATS_SessionHandle *
+ (*session_add)(void *cls,
+ const struct GNUNET_ATS_SessionData *data);
+
+ void
+ (*session_update)(void *cls,
+ struct GNUNET_ATS_SessionHandle *sh,
+ const struct GNUNET_ATS_SessionData *data);
+
+ void
+ (*session_del)(void *cls,
+ struct GNUNET_ATS_SessionHandle *sh,
+ const struct GNUNET_ATS_SessionData *data);
+
+};
+
+#endif
+
+/** @} */ /* end of group */
diff --git a/src/include/gnunet_ats_transport_service.h
b/src/include/gnunet_ats_transport_service.h
index b55c6a374..0df703712 100644
--- a/src/include/gnunet_ats_transport_service.h
+++ b/src/include/gnunet_ats_transport_service.h
@@ -39,7 +39,7 @@
/**
- * ATS performance characteristics for an address.
+ * ATS performance characteristics for a session.
*/
struct GNUNET_ATS_Properties
{
diff --git a/src/include/gnunet_container_lib.h
b/src/include/gnunet_container_lib.h
index bd9ce7bb2..a06d697f7 100644
--- a/src/include/gnunet_container_lib.h
+++ b/src/include/gnunet_container_lib.h
@@ -1580,9 +1580,10 @@ struct GNUNET_CONTAINER_MultiHashMap32Iterator;
* iterate,
* #GNUNET_NO if not.
*/
-typedef int (*GNUNET_CONTAINER_HashMapIterator32) (void *cls,
- uint32_t key,
- void *value);
+typedef int
+(*GNUNET_CONTAINER_HashMapIterator32) (void *cls,
+ uint32_t key,
+ void *value);
/**
@@ -1604,8 +1605,7 @@ GNUNET_CONTAINER_multihashmap32_create (unsigned int len);
* @param map the map
*/
void
-GNUNET_CONTAINER_multihashmap32_destroy (struct GNUNET_CONTAINER_MultiHashMap32
- *map);
+GNUNET_CONTAINER_multihashmap32_destroy (struct
GNUNET_CONTAINER_MultiHashMap32 *map);
/**
--
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